Pre-commission cleaning is achieved through a process of flushing and chemical cleaning (where required) followed by the addition of biocides and inhibitors. Systems designed and cleaned in accordance with BSRIA's BG 29/2012 guidance are far less likely to experience operating problems.
The main contaminants found in both heating and chilled closed loop water systems are installation debris, scale, corrosion products and biological fouling. These cause various different problems but in general, to some degree detrimentally affect the operating efficiency of the system and the life of the system materials.
Thorough pre-commission cleaning of pipework has become even more important with the adoption of energy efficient controls strategies that may result in low flow rates, particularly in terminal units with very small orifices in control valves.
Using non-acidic cleaners, which will not attack materials of construction but will remove cutting oil, jointing paste, mill scale and other material residue in a system, pipework can be cleaned giving optimum flow-rates for commissioning.
The system is thus protected, giving the client value for money as their system will have extremely low rates of corrosion & scaling, resulting in higher energy efficiency, translating to lower running costs and a longer operational lifespan of the system.
Existing Systems - Additionally, older systems that have accumulated deposits due to lack of the correct water treatment can be cleaned and treated utilising similar methods. This type of approach is suitable for heating or chilled water systems that are being extended, or may be experiencing poor heat output due to low flow rates.
System Monitoring - Routine testing of any closed system should be an essential part of any affective PPM management system. If not treated properly, closed heating and chilled water systems can very quickly become contaminated with microbiological fouling, scale and corrosion leading to the formation of sludge and suspended solids. The result of this can lead to the system not performing as effectively or efficiently as it should due to blockages and reduced heat transfer.